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LLGL2 targets the Hedgehog signaling pathway to influence malignant progression of endometrial cancer LLGL2靶向Hedgehog信号通路影响子宫内膜癌的恶性进展。
IF 4.4 2区 生物学 Q2 CELL BIOLOGY Pub Date : 2024-12-06 DOI: 10.1016/j.cellsig.2024.111553
Hua Yang , Yuqing Ji , Dong Liu , Ou Chai , Zhiying Qi , Ruimeng Guo , Bei Sun , Fang Wang

Background

Endometrial cancer (EC) is a malignant tumor of the endometrial epithelium, with endometrial adenocarcinoma being the most common type. It has a good overall prognosis, but recurrence and metastasis are often associated with poorer outcomes. LLGL2 is closely linked to tumorigenesis; however, its in endometrial carcinoma is unknown. This study investigated the biological function of LLGL2 in endometrial cancer and its intrinsic molecular mechanisms in promoting the malignant progression of the disease.

Methods

The expression of LLGL2 in endometrial cancer was analyzed using the TCGA database via UALCAN and validated through western blot analysis, RT-qPCR, and immunohistochemistry. Additionally, the correlation between LLGL2 and the clinicopathological features of patients was examined. The effects of LLGL2 on the proliferation and migration of endometrial cancer cells were assessed using EdU proliferation assay, clone formation assay, Transwell assay, scratch assay, and the detection of proliferation and metastasis markers. Furthermore, the impact of LLGL2 on key genes of the Hedgehog signaling pathway, including SHH, PTCH1, SMO, and GLI1, was explored using western blot analysis and RT-qPCR. The expression of SHH, PTCH1 and GLI1 was also detected in cells treated with the Hedgehog signaling pathway inhibitor (JK184) in endometrial cancer cells overexpressing LLGL2. Finally, the role of LLGL2 in tumor growth was investigated in vivo using sh-LLGL2 and OE-LLGL2 nude mouse tumorigenic model.

Results

LLGL2 expression was upregulated in endometrial cancer tissues compared to normal endometrium. LLGL2 expression was significantly correlated with tumor histological grading (p < 0.01). LLGL2 promoted proliferation, migration, and invasive abilities of endometrial cancer cells. In the nude mouse tumorigenic model, LLGL2 deficiency inhibited the growth of subcutaneously transplanted tumors, and overexpression of LLGL2 promoted the growth of tumors. At the molecular level, LLGL2 may promote the transduction of the Hedgehog signaling pathway in endometrial cancer cells.

Conclusion

LLGL2 may be involved in the development of endometrial cancer as an oncogene, leading to aberrant activation of the Hedgehog signaling pathway. Therefore, LLGL2 is a potential new target for the treatment of endometrial cancer.
背景:子宫内膜癌(Endometrial cancer, EC)是子宫内膜上皮的恶性肿瘤,其中子宫内膜腺癌是最常见的类型。它具有良好的整体预后,但复发和转移往往与较差的预后相关。LLGL2与肿瘤发生密切相关;然而,其在子宫内膜癌中的作用尚不清楚。本研究探讨了LLGL2在子宫内膜癌中的生物学功能及其促进该疾病恶性进展的内在分子机制。方法:利用TCGA数据库,通过UALCAN分析LLGL2在子宫内膜癌中的表达,并通过western blot分析、RT-qPCR和免疫组织化学进行验证。此外,我们还研究了LLGL2与患者临床病理特征的相关性。采用EdU增殖实验、克隆形成实验、Transwell实验、划痕实验以及增殖和转移标志物检测,评估LLGL2对子宫内膜癌细胞增殖和迁移的影响。此外,利用western blot分析和RT-qPCR技术探讨了LLGL2对Hedgehog信号通路关键基因SHH、PTCH1、SMO和GLI1的影响。在JK184处理过表达LLGL2的子宫内膜癌细胞中,SHH和GLI1的表达也被检测到。最后,采用sh-LLGL2和OE-LLGL2裸鼠致瘤模型,在体内研究LLGL2在肿瘤生长中的作用。结果:与正常子宫内膜相比,LLGL2在子宫内膜癌组织中的表达上调。结论:LLGL2可能作为癌基因参与了子宫内膜癌的发生发展,导致Hedgehog信号通路异常激活。因此,LLGL2是治疗子宫内膜癌的潜在新靶点。
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引用次数: 0
SSBP1 positively regulates RRM2, affecting epithelial mesenchymal transition and cell cycle arrest in human lung adenocarcinoma cells SSBP1正调控RRM2,影响人肺腺癌细胞上皮间质转化和细胞周期阻滞。
IF 4.4 2区 生物学 Q2 CELL BIOLOGY Pub Date : 2024-12-04 DOI: 10.1016/j.cellsig.2024.111552
Xingyu Yang , Bingfeng Ma , Yafeng Liu , Jiawei Zhou , Jianqiang Guo , Yuanyuan Peng , Ying Bai , Jing Wu , Dong Hu
Progression of lung adenocarcinoma (LUAD) is frequently associated with alterations in epithelial-mesenchymal transition (EMT) and cell cycle. Our study analyzed the Cancer Genome Atlas (TCGA) database and identified a positive correlation between high expression of SSBP1 in LUAD tumor tissues and poor prognosis (p < 0.05), with an AUC of 0.853, suggesting that SSBP1 could serve as a prognostic biomarker. In vitro experiments, including siRNA-mediated SSBP1 knockdown and subsequent cell cloning and Transwell assays, revealed significant inhibition of proliferation, migration, and cell cycle progression in LUAD cells (p < 0.05). In vivo mouse model experiments further confirmed that SSBP1 knockdown inhibits tumor burden (p < 0.05). Mechanistic investigations, integrating pathway enrichment analysis with molecular biology techniques, identified RRM2 as a downstream target of SSBP1, and RRM2 knockdown similarly suppressed LUAD cell proliferation, migration, and cell cycle progression (p < 0.05). These findings indicate that SSBP1 promotes EMT and cell cycle progression in LUAD cells by positively regulating RRM2, thereby accelerating disease progression. Collectively, our study not only confirms the potential role of SSBP1 in LUAD but also provides a theoretical foundation for therapeutic strategies targeting the SSBP1/RRM2 axis, potentially offering new therapeutic targets for LUAD patients.
肺腺癌(LUAD)的进展通常与上皮-间质转化(EMT)和细胞周期的改变有关。我们的研究分析了癌症基因组图谱(TCGA)数据库,发现SSBP1在LUAD肿瘤组织中的高表达与预后不良呈正相关(p
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引用次数: 0
PTPN22 and the pathogenesis of ulcerative colitis: Insights into T cell differentiation and the JAK/STAT signaling pathway PTPN22与溃疡性结肠炎的发病机制:对T细胞分化和JAK/STAT信号通路的见解。
IF 4.4 2区 生物学 Q2 CELL BIOLOGY Pub Date : 2024-12-04 DOI: 10.1016/j.cellsig.2024.111551
Yang Yu , Xinlei Ba , Tong Li , Wenying Xu , Jiahui Zhao , Na Zhang , Yanjiao Zhao , Tao Wang , Xiaonan Zhang , Xipeng Wang , Bin Bai , Bing Wang
70 % of the ulcerative colitis (UC) linked gene loci are associated with other autoimmune or immunodeficient diseases. The phosphatase activity of PTPN22 can regulate the development of T cells and contribute to regulate the level of inflammation in autoimmune diseases. We produced PTPN22-CS thymus-specific transgenic mice, which suppressed PTPN22 enzyme activity in the thymocytes. Overexpressed PTPN22-CS facilitated the development of the thymocytes towards CD4+T cells and resulted in an increased proportion of the Th1 and Treg cells in the UC mesenteric lymph nodes. PTPN22-CS promoted the activation of the JAK/STAT signaling pathway in the Th1 and Treg cells that localized in the colon, resulting in an excessive production of inflammatory mediators such as IL-2 and IFN-γ. Consequently, PTPN22-CS contributes to the inflammatory response of ulcerative colitis. In summary, the tyrosine phosphatase activity of PTPN22 plays a role in modulating UC by regulating T cell differentiation and modulating the JAK/STAT signaling pathway, thereby influencing the inflammatory response in colonic. These findings provide new insight into the association between PTPN22 and the pathogenesis of UC.
70% 溃疡性结肠炎(UC)相关基因位点与其他自身免疫或免疫缺陷疾病相关。PTPN22的磷酸酶活性可以调节T细胞的发育,并有助于调节自身免疫性疾病的炎症水平。我们培育了胸腺特异性PTPN22- cs转基因小鼠,其抑制了胸腺细胞中PTPN22酶的活性。PTPN22-CS的过表达促进了胸腺细胞向CD4+T细胞的发展,导致UC肠系膜淋巴结中Th1和Treg细胞的比例增加。PTPN22-CS促进位于结肠的Th1和Treg细胞中JAK/STAT信号通路的激活,导致IL-2和IFN-γ等炎症介质的过量产生。因此,PTPN22-CS参与溃疡性结肠炎的炎症反应。综上所述,PTPN22酪氨酸磷酸酶活性通过调节T细胞分化和调节JAK/STAT信号通路,从而影响结肠炎症反应,在UC的调节中发挥作用。这些发现为PTPN22与UC发病机制之间的关系提供了新的见解。
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引用次数: 0
Corrigendum to “Fangchinoline inhibits metastasis and reduces inflammation-induced epithelial-mesenchymal transition by targeting the FOXM1-ADAM17 axis in hepatocellular carcinoma” [Cell Signal. 2024 Dec:124:111467] “抗胆碱抑制肝癌细胞转移和减少炎症诱导的上皮-间质转化”[j].细胞信号,2024,12:124 - 111467。
IF 4.4 2区 生物学 Q2 CELL BIOLOGY Pub Date : 2024-12-04 DOI: 10.1016/j.cellsig.2024.111542
Liyun Zheng , Vinothkumar Rajamanickam , Mengyuan Wang , Huajun Zhang , Shiji Fang , Michael Linnebacher , A.M. Abd El-Aty , Xinbin Zhang , Yeyu Zhang , Jianbo Wang , Minjiang Chen , Zhongwei Zhao , Jiansong Ji
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引用次数: 0
Inhibition of XIST restrains paclitaxel resistance in breast cancer cells by targeting hsa-let-7d-5p/ATG16L1 through regulation of autophagy 抑制XIST通过调控自噬作用靶向hsa-let-7d-5p/ATG16L1抑制乳腺癌细胞紫杉醇耐药。
IF 4.4 2区 生物学 Q2 CELL BIOLOGY Pub Date : 2024-12-03 DOI: 10.1016/j.cellsig.2024.111534
Yueyue Wang , Wenhao Pei , Yuping Yang , Chaoqun Xia , Qiang Zhang , Zhijun Geng , Xiuru Shi , Fengchao Wang
Breast cancer is a fatal malignant tumor in women worldwide. The development of paclitaxel resistance remains a challenge. Autophagy is considered to have a significant part in the chemotherapeutic stress mechanism. This study aimed to investigate the function of long non-coding RNA (lncRNA) in breast cancer cell chemoresistance and autophagy. The paclitaxel (PTX)-resistant breast cancer cells were established. The function of X-inactive specific transcript (XIST) was demonstrated using in vitro and in vivo experiments. Transmission electron microscope (TEM) was used to observe autophagy vesicles. Protein and mRNA levels were determined using western blotting and quantitative real time polymerase chain reaction (qRT-PCR). We discovered that autophagic activity was correlated with chemoresistance in PTX-resistant breast cancer cells. In vitro and in vivo studies showed that XIST inhibition reduced cell resistance to paclitaxel, caused autophagy to be suppressed by regulating hsa-let-7d-5p and ATG16L1 expression. Mechanically, threonine protein kinase B (PKB; also known as AKT) - mammalian target of rapamycin (mTOR) pathway was activated when knockdown of XIST, while was reversed by inhibition of hsa-let-7d-5p. Our results verified that XIST played a significant role in developing chemoresistance via mediating autophagy in PTX-resistant breast cancer cells. It may be a potential target for breast cancer treatment strategies.
乳腺癌是全世界妇女中一种致命的恶性肿瘤。紫杉醇耐药性的发展仍然是一个挑战。自噬被认为在化疗应激机制中起着重要作用。本研究旨在探讨长链非编码RNA (lncRNA)在乳腺癌细胞化疗耐药和自噬中的作用。建立紫杉醇(PTX)耐药乳腺癌细胞。体外和体内实验证实了x -无活性特异性转录物(XIST)的功能。透射电镜(TEM)观察自噬囊泡。采用western blotting和定量实时聚合酶链反应(qRT-PCR)检测蛋白和mRNA水平。我们发现ptx耐药乳腺癌细胞的自噬活性与化疗耐药相关。体外和体内研究表明,XIST抑制通过调节hsa-let-7d-5p和ATG16L1的表达,降低细胞对紫杉醇的耐药性,抑制细胞自噬。机械上,苏氨酸蛋白激酶B (PKB;AKT) -哺乳动物雷帕霉素靶蛋白(mTOR)通路在敲低XIST时被激活,而抑制hsa-let-7d-5p则被逆转。我们的研究结果证实,XIST通过介导ptx耐药乳腺癌细胞的自噬,在化疗耐药中发挥了重要作用。它可能是乳腺癌治疗策略的潜在目标。
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引用次数: 0
AIM2 promotes the progression of HNSCC via STAT1 mediated transcription and IL-17/MAPK signaling AIM2通过STAT1介导的转录和IL-17/MAPK信号传导促进HNSCC的进展。
IF 4.4 2区 生物学 Q2 CELL BIOLOGY Pub Date : 2024-12-03 DOI: 10.1016/j.cellsig.2024.111545
Dong Ding , Hongfei Liu , Liping Zhang , Guoxin Zhang , Yumin Wei , Wenlong Zhang , Xingjiu Yang , Mengyuan Li , Gaofei Yin , Wei Guo , Xiaohong Chen , Zhigang Huang , Ran Gao
Chronic inflammation has been recognized as one of the hallmarks of head and neck squamous cell carcinoma (HNSCC), Absent In Melanoma 2(AIM2) has emerged as important regulators of chronic inflammatory, and participated in initiation, progression of kinds of human cancers. Nonetheless, the biological functions and underlying mechanisms of AIM2 in HNSCC remain inadequately understood. Based on the bioinformatics analysis of public databases, we identified elevated AIM2 expression in HNSCC, which positively correlates with disease stage and HPV infection, thereby possessing both diagnostic and prognostic significance. Immunohistochemistry on clinical samples revealed that AIM2 expression was frequently upregulated in cancerous tissues compared to paracancerous tissues, exhibiting a significant association with Ki-67 expression. Modulating AIM2 expression in HNSCC cell lines through transfection with inhibitors or mimics demonstrated that ectopic AIM2 expression enhances cell growth, migration, tumorigenesis, and metastasis both in vitro and in vivo. A dual luciferase reporter assay indicated that the transcription factor STAT1 can bind directly to the AIM2 promoter region and activate its transcription. The STAT1 inhibitor, fludarabine, reduces AIM2 expression and subsequently diminishes cell proliferation. Mechanistically, AIM2 exerts its tumor-promoting effects through the IL-17-MAPK signaling pathway. Collectively, our data demonstrate that AIM2, transcriptionally activated by STAT1, exhibits oncogenic functions by promoting the IL-17-MAPK signaling pathway, suggesting that AIM2 may be a new intervention targets for the diagnostic and treatment of HNSCC.
慢性炎症已被认为是头颈部鳞状细胞癌(HNSCC)的标志之一,缺席黑色素瘤2(AIM2)已成为慢性炎症的重要调节因子,并参与各种人类癌症的发生、发展。然而,AIM2在HNSCC中的生物学功能和潜在机制尚不清楚。基于公共数据库的生物信息学分析,我们发现AIM2在HNSCC中表达升高,与疾病分期和HPV感染呈正相关,具有诊断和预后意义。临床样本免疫组化显示AIM2在癌组织中的表达比癌旁组织频繁上调,与Ki-67表达显著相关。通过转染抑制剂或模拟物调节AIM2在HNSCC细胞系中的表达表明,AIM2的异位表达在体外和体内都能促进细胞生长、迁移、肿瘤发生和转移。双荧光素酶报告基因实验表明,转录因子STAT1可以直接结合AIM2启动子区域并激活其转录。STAT1抑制剂氟达拉滨可降低AIM2的表达并随后降低细胞增殖。机制上,AIM2通过IL-17-MAPK信号通路发挥促肿瘤作用。总的来说,我们的数据表明,由STAT1转录激活的AIM2通过促进IL-17-MAPK信号通路表现出致癌功能,这表明AIM2可能是诊断和治疗HNSCC的新干预靶点。
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引用次数: 0
Hypoxia regulates small extracellular vesicle biogenesis and cargo sorting through HIF-1α/HRS signaling pathway in head and neck squamous cell carcinoma 缺氧通过HIF-1α/HRS信号通路调控头颈部鳞状细胞癌细胞外小泡生物发生和货物分选。
IF 4.4 2区 生物学 Q2 CELL BIOLOGY Pub Date : 2024-12-02 DOI: 10.1016/j.cellsig.2024.111546
Yiman Wang , Bolin Xiao , Jinbang Li , Mengyao Zhang , Linzhou Zhang , Liguo Chen , Jing Zhang , Gang Chen , Wei Zhang
Small extracellular vesicles (sEVs) act as crucial messengers that transmit biological signals in hypoxic tumor microenvironment (TME), significantly impacting cancer progression. However, the precise mechanism by which hypoxia influences sEV biogenesis remains poorly understood. In this study, we observed increased sEV secretion and alterations in cargo composition in head and neck squamous cell carcinoma (HNSCC) cells under hypoxic conditions. We found that hepatocyte growth factor–regulated tyrosine kinase substrate (HRS), a key component of the endosomal sorting complexes required for transport (ESCRT), was upregulated during hypoxia. This upregulation activated the endosomal system and reduced degradation of multivesicular bodies (MVBs). HRS depletion altered the packaging of protein cargoes such as mitochondria-related proteins into sEVs under hypoxia, and these cargoes promoted a pro-tumorigenic phenotype of macrophages. Importantly, we demonstrated that HRS is transcriptionally activated by hypoxia inducible factor-1α (HIF-1α). Spatial transcriptomics and immunohistochemistry revealed a positive correlation between HRS and HIF-1α. These findings establish a link between the hypoxic response, sEV biogenesis, and cargo packaging, enhancing our understanding of how the hypoxic TME influences sEV biogenesis in HNSCC cells.
在低氧肿瘤微环境中,小细胞外囊泡(sev)作为传递生物信号的重要信使,显著影响肿瘤的进展。然而,缺氧影响sEV生物发生的确切机制尚不清楚。在这项研究中,我们观察到缺氧条件下头颈部鳞状细胞癌(HNSCC)细胞中sEV分泌增加和货物成分的改变。我们发现肝细胞生长因子调节的酪氨酸激酶底物(HRS)是运输所需的内体分选复合物(ESCRT)的关键成分,在缺氧时上调。这种上调激活了内体系统,减少了多泡体(MVBs)的降解。HRS耗竭改变了蛋白质货物的包装,如线粒体相关蛋白在缺氧下进入sev,这些货物促进了巨噬细胞的致瘤表型。重要的是,我们证明了HRS是由缺氧诱导因子-1α (HIF-1α)转录激活的。空间转录组学和免疫组化结果显示HRS与HIF-1α呈正相关。这些发现建立了缺氧反应、sEV生物发生和货物包装之间的联系,增强了我们对缺氧肿瘤微环境如何影响HNSCC细胞中sEV生物发生的理解。
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引用次数: 0
Microtubule-Rab5 mutual-influential system screening based on gene-regulatory networks map in Rab5 RNAi eye-degeneration model Rab5 RNAi眼变性模型中基于基因调控网络图谱的微管-Rab5互影响系统筛选
IF 4.4 2区 生物学 Q2 CELL BIOLOGY Pub Date : 2024-12-02 DOI: 10.1016/j.cellsig.2024.111544
Yuyu Nan , Jingjing Lin , Zaiwa Wei , Yufeng Yang , Qinghua Li
Rabs are involved in neuronal development and protrusion formation. Existing studies support the notion that manipulation or mutation of Rab genes could lead to functional changes in neurons. However, whether Rabs gene-manipulation induced Drosophila eye-degeneration remains unknown. By down-regulating Rab5, but not Rab7, we first constructed a compound eye injury model in Drosophila. As the distribution, content, and even maturation of Rab5-positive endosomes are influenced by cytoskeletal proteins, like actin or tubulin-related proteins, the existence of a bidirectional regulatory relationship between Rab5 and the cytoskeleton remains unclear and worth researching. Through complete transcriptome sequencing combined immunofluorescence testing, we confirmed that down-regulation of Rab5 affected the increase of α-Tub84B (alternatively named TubA84B) but not γ-tubulin. Based on Weighted Gene Co-Expression Network Analysis (WGCNA) and multi-tissue screening verification, this study proposes that the apoptosis-related factors–Rab5–TubA84B have conserved regulatory functions with cooperative expression. Gene manipulation confirmed that apoptotic factors, especially rpr, strongly regulate Rab5, and may ultimately influence microtubule structure through complex routes, including the Rab5 variance and the intracellular configuration ratio of α-Tubulin to Glyceraldehyde-3-phosphate dehydrogenase.
Rabs参与神经元的发育和突起的形成。现有的研究支持这样一种观点,即操纵或突变Rab基因可能导致神经元的功能改变。然而,Rabs基因操作是否导致果蝇眼睛变性仍然未知。通过下调Rab5而不下调Rab7,我们首次构建了果蝇复眼损伤模型。由于Rab5阳性核内体的分布、含量甚至成熟都受到细胞骨架蛋白(如肌动蛋白或微管蛋白相关蛋白)的影响,Rab5与细胞骨架之间是否存在双向调节关系尚不清楚,值得进一步研究。通过全转录组测序结合免疫荧光检测,我们证实Rab5的下调影响α-Tub84B(也称为TubA84B)的升高,但不影响γ-微管蛋白的升高。基于加权基因共表达网络分析(Weighted Gene Co-Expression Network Analysis, WGCNA)和多组织筛选验证,本研究提出凋亡相关因子- rab5 - tuba84b具有协同表达的保守调控功能。基因操作证实,凋亡因子,尤其是rpr,强烈调节Rab5,并可能最终通过复杂的途径影响微管结构,包括Rab5变异和α-微管蛋白与甘油醛-3-磷酸脱氢酶的胞内构型比。
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引用次数: 0
METTL3-mediated SMPDL3A promotes cell growth, metastasis and immune process of hepatocellular carcinoma by regulating LRPPRC mettl3介导的SMPDL3A通过调控LRPPRC促进肝癌细胞生长、转移和免疫过程。
IF 4.4 2区 生物学 Q2 CELL BIOLOGY Pub Date : 2024-12-02 DOI: 10.1016/j.cellsig.2024.111543
Weixin Xu , Miaomiao Tao , Yeqiong Liu , Jun Yan , Jiali Hu , Lei Wang

Background

Methyltransferase-like protein 3 (METTL3) has been confirmed to act as a tumor promoter to regulate hepatocellular carcinoma (HCC) progression. Therefore, more roles and mechanisms of METTL3 in HCC progression deserve to be further revealed.

Methods

The mRNA and protein levels of METTL3, sphingomyelin phodiesterase acid-like 3 A (SMPDL3A), and leucine rich pentatricopeptide repeat containing (LRPPRC) were determined by qRT-PCR and western blot. Cell proliferation, apoptosis, invasion and migration were detected by CCK8 assay, EdU assay, flow cytometry, transwell assay and wound healing assay. HCC cells were co-cultured with phytohemagglutinin-stimulated peripheral blood mononuclear cells, cytokine-induced killer cells, or CD8 + T-cells. IFN-γ, TNF-α levels, HCC cell survival rate and CD8 + T-cell apoptosis were determined to assess cell immune process. The interaction between METTL3, SMPDL3A and LRPPRC was assessed by MeRIP assay, RIP assay, dual-luciferase reporter assay or Co-IP assay. Animal experiments were performed to evaluate the effect of METTL3 knockdown on HCC tumorigenesis and lung metastasis.

Results

METTL3 was upregulated in HCC tissues and cells, and its knockdown repressed HCC cell proliferation, invasion, migration, immune process and promoted apoptosis. METTL3 increased SMPDL3A mRNA stability by m6A methylation modification, and this modification could be recognized by IGF2BP1. SMPDL3A overexpression reversed the inhibitory effect of METTL3 knockdown on HCC cell growth, metastasis and immune process. SMPDL3A interacted with LRPPRC to positively regulate its expression, and LRPPRC overexpression also eliminated the regulation of SMPDL3A silencing on HCC progression. In addition, downregulation of METTL3 repressed HCC tumorigenesis and lung metastasis via mediating SMPDL3A/LRPPRC axis.

Conclusion

METTL3 accelerated HCC cell growth, metastasis and immune process by regulating SMPDL3A/LRPPRC axis, providing a potential target for HCC treatment.
背景:甲基转移酶样蛋白3 (METTL3)已被证实作为肿瘤启动子调节肝细胞癌(HCC)的进展。因此,METTL3在HCC进展中的更多作用和机制值得进一步揭示。方法:采用qRT-PCR和western blot检测METTL3、鞘磷脂磷酸二酯酶样3 A (SMPDL3A)和富含亮氨酸的五肽重复序列(LRPPRC) mRNA和蛋白水平。CCK8法、EdU法、流式细胞术、transwell法和创面愈合法检测细胞增殖、凋亡、侵袭和迁移。HCC细胞与植物血凝素刺激的外周血单个核细胞、细胞因子诱导的杀伤细胞或CD8 + t细胞共培养。通过检测IFN-γ、TNF-α水平、HCC细胞存活率和CD8 + t细胞凋亡来评估细胞免疫过程。采用MeRIP法、RIP法、双荧光素酶报告基因法或Co-IP法评估METTL3、SMPDL3A和LRPPRC之间的相互作用。通过动物实验研究METTL3基因下调对肝癌发生及肺转移的影响。结果:METTL3在HCC组织和细胞中表达上调,其下调可抑制HCC细胞增殖、侵袭、迁移、免疫过程,促进细胞凋亡。METTL3通过m6A甲基化修饰提高SMPDL3A mRNA的稳定性,这种修饰可以被IGF2BP1识别。SMPDL3A过表达逆转了METTL3敲低对HCC细胞生长、转移和免疫过程的抑制作用。SMPDL3A与LRPPRC相互作用,正向调节其表达,LRPPRC过表达也消除了SMPDL3A沉默对HCC进展的调节作用。此外,下调METTL3通过介导SMPDL3A/LRPPRC轴抑制HCC的发生和肺转移。结论:METTL3通过调控SMPDL3A/LRPPRC轴加速肝癌细胞生长、转移和免疫过程,为肝癌治疗提供了潜在靶点。
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引用次数: 0
Expression of concern: The emerging crosstalk between atherosclerosis-related microRNAs and Bermuda triangle of foam cells: Cholesterol influx, trafficking, and efflux. 表达关切:动脉粥样硬化相关 microRNA 与泡沫细胞百慕大三角之间新出现的串扰:胆固醇流入、贩运和外流。
IF 4.4 2区 生物学 Q2 CELL BIOLOGY Pub Date : 2024-12-01 Epub Date: 2024-09-07 DOI: 10.1016/j.cellsig.2024.111394
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引用次数: 0
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